Control device for automatically starting warm-up

Abstract

A control device of the present invention estimates warm-up time that it takes for a warm-up of a machine based on the temperature of the machine to be warmed up and the saturation temperature that is unique to the machine. Warm-up start time is calculated based on the obtained warm-up time and predefined warm-up end time. In this way, the warm-up can be efficiently performed as the warm-up can be performed for an appropriate period of time in consideration of the saturation temperature unique to the machine.

What is claimed is: 
     
       1. A control device that controls a warm-up of a machine in accordance with an operation program, the control device comprising:
 a storage unit that stores warm-up end time; 
 a time measurement unit that measures current time; 
 a temperature measurement unit that measures temperature of the machine; and 
 a control unit that controls operation of the machine, the control unit comprising:
 an estimating unit that estimates warm-up time that it takes for the warm-up of the machine based on a difference between the temperature of the machine that is measured by the temperature measurement unit and saturation temperature that is unique to the machine; 
 a start time determination unit that determines warm-up start time by subtracting the warm-up time estimated by the estimating unit from the warm-up end time stored in the storage unit; 
 a warm-up start unit that starts the warm-up of the machine based on the current time measured by the time measurement unit and the warm-up start time determined by the start time determination unit; and 
 a warm-up end unit that ends the warm-up of the machine when the current time measured by the time measurement unit coincides with the warm-up end time stored in the storage unit. 
 
 
     
     
       2. The control device according to  claim 1 , wherein the warm-up start unit is configured to start the warm-up of the machine when the current time measured by the time measurement unit coincides with the warm-up start time determined by the start time determination unit. 
     
     
       3. The control device according to  claim 1 , wherein the estimating unit is configured to calibrate the warm-up time in accordance with an operation speed of the machine. 
     
     
       4. The control device according to  claim 1 , wherein the control unit further comprises a disturbance detection unit that detects generation of a disturbance, and the control unit is configured to change an operation condition of the machine when the disturbance detection unit detects a disturbance, so that an influence of the disturbance is compensated and the warm-up of the machine is completed by the warm-up end time.